They watched the aurora for quite a long time. Eventually, the chill of the night began to give them a feeling, bringing them back to reality. David noticed that Gustav was more tired than he wanted to show.
Well, yes, that meeting with that strange man today, bringing back painful childhood memories, listening to those awful words... Gustav must have felt tired, especially mentally. Poor thing. And on top of that, he had to show David the aurora borealis.
Although David did not feel that for Gustav the latter was an onerous duty. On the contrary, he felt warmth and... love flowing from Meiden.
Now Gustav was asleep. He fell asleep almost as soon as he put his head against the pillow, which was perhaps the best evidence of his tiredness. He slept holding David's hands in his palms.